Answer:
Domain is the set of inputs that will give you a defined output.
In example, f(x)=5/x, the domain would be all real numbers except for 0, because if it would be 0, it would be 5/0 which would be undefined.
Range is the set of outputs that are possible.
In example, f(g)=g(0), the range would be 0.
Density is g/cm and you have g and cm so 150/100=1.5g/cm^3
Do you have a picture of the trapezoid graphed ?
